Jean bonicard



(No Model.)

J. BONICARD. STEAM GENERATOR AND SUPERHBATER' No. 507,644. Patented Oct.31 1893.

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NrrED STATES PATENT OFFICE.

JEAN BONICARD, OF PARIS, FRANCE.

STEAM GENERATOR AND SUPERHEATER.

SPECIFICATION forming part of Letters Patent No. 507,644, dated October31, 1893.

Application filed June 24,1893- Serial No. 478,701- (No model.) Patentedin France February 23, 1893, No. 228,165, and in England June 1, 1893,No. 10,759.

To all whom, it may concern.-

Be it. known that I, JEAN BONIOARD, a citizen of the French Republic,and a resident of No. 37 Rue Bouret, Paris, France, have inventedcertain Improvements in Steam Generators and Superheaters, (for whichpatents have been granted in France, No. 228,165, dated February 23,1893, and in Great Britain, No. 10,759, dated June 1, 1893,) of whichthe following is a specification.

My invention relates to the class of steam generators which haveconnected with them suitable superheaters for the steam, interposedbetween the outlet for the saturated or ordinary steam and the servicesteam pipe.

My invention resides mainly in the superheater.

In the annexed drawings I have shown. an embodiment of my inventionFigure 1 being a Vertical mid-section of the generator and superheaterin the plane indicated by the line 1, 1, in Fig. 2, and Fig. 2 is anelevation, except as to the lower part, which is in section in the planeindicated by the line 2, 2, in Fig. 1.

X represents an outer casing in the base of which is constructed thefurnace F.

The steam generator comprises a lower or water chamber A, and an upperor steam chamber B. These chambers are connected by tubes T, and by adrum or casing W. The hot products of combustion pass up through tubesE, which extend through the chamber A, and circulate among the tubes T,within the casing W, passing off through a chimney V, which taps thecasing W. Water is supplied to the chamber A of the generator by asupply pipe O, and the saturated steam finds an outlet from the chamberB at a pipe D. This construction insures a rapid evaporation of theWater, and the steam generated passes through the outlet pipe D downthrough a pipe G, and thence to a superheater in the fire-box of thefurnace by a pipe G The superheater comprises a strong and tight drum orchamber K, which is connected at one end with the steam-inlet pipe G andat the other end with the steam supply pipe L, which leads thesuperheated steam to the engine, or to any required point for use. Inthe pipe G is a check valve g, which prevents the superheated steam frompassing back to the chamber or section B of the generator. In startingup the furnace, however, if there should be Water of condensation in thesuperheating drum K, it will first feel the effect of the heat and beconverted into steam, and in order to allow this steam to pass into thechamber B, I provide the by-pipe Q, which connects with the pipe G atits extremities in a way to bridge over the check valve g. In this pipeQ, is a manually operated cut-off valve R. The drum K, of thesuperheater has a jacket M in the form of a cylinder provided withtubular journals t, through which the respective pipes GP and L pass,said pipes forming bearings about which the jacket M- may turn. One ofthe journals t is furnished with a hand-wheel P, by which the jacket maybe conveniently turned. The jacket is open along one side, as seen at Oin Fig. 2, and there is an annular space between the drum K and itsjacket M, through which may circulate the hot gases from the furnace,which enter at the opening 0. By rotating the jacket M so as to bringthe opening 0 more or less nearly toward the lower side, so as to exposethe drum K more or less directly to the flames of the furnace, thepressure of the steam in the superheater may be regulated. The jacket Mis in the nature of a shield to protect the superheating chamber more orless from the direct action of the flame and heat.

The generator may be arranged either vertically or horizontally and isso constructed that it can be readily dismantled for cleaning orrepairs. It is not liable to explosion, and is sufficient to generateasteam tension in the chamber B of from one to two kilograms; when ledinto the superheater, the steam tenfive kilograms, this tension beingcontrollable by the shifting or rotation of the jacket or shield M.

An economy of thirty to thirty-five per cent. in fuel may be attained bythe use of the superheater, and it also enables a comparatively smallgenerator to be used.

Having thus described my invention, I

, claim-- 1. The combination with a steam generator and its furnace, ofa superheating chamber 'sion may be increased to from five to twentyforthe steam, situated in the furnace and connected on the one side withthesteam outlet of the generator, and on the other side with the supplypipe for the superheated steam, and a movable shield or jacket aboutsaid superheating chamber, adapted for shielding the latter to a greateror less extent from the direct action of the flames, as may be desired.

2. The combination with a steam generator and its furnace, of asuperheating chamber situated in the furnace above the fire-bed, andconnected on the one side with the steam outlet of the generator, and onthe other side with the supply pipe for superheated steam, and therotative jacket M, about said chamher, said jacket having an opening 0for the admission of the hot gases to the jacket space and journals tosupport it rotatively.

3. The combination with-a steam generator and its furnace, of thehorizontally arranged chamber K, situated in the upper part of thefurnace and connected at its respective ends with the pipes G and L, theformer of which connects with the steam outlet of the generator, thesaid pipes, the jacket M, which houses the chamber K, and has an opening0 for the admission of the furnace gases, the tubular journals 6, ofsaid jacket through which the respective pipes GX and L extend, and thehand-wheel P, on one of the journals t, substantially as set forth.

4. The combination with a steam generator and its furnace, of the steamoutlet pipe D, the pipe G the pipeG connecting the pipes D and G, thecheck-valve g, in the pipe G, the by-pipe Q, connected at itsextremities with the pipe Gand bridging the check-valve, a valve R inthe pipe Q, a superheater in the furnace connected with the pipe G" atits receiving end, and the supply pipe for superheated steam connectedwith the superheater, substantially as set forth.

In witness whereof I have hereunto signed my name in the presence of twosubscribing witnesses.

JEAN BONIOARD.

\Vitnesses:

ROBT. M. IIOOPER, ALEXANDRE MATHIEU.

